new javax.activation.DataHandler(bufferedXML,
"text/xml; charset=" + charSetEncoding);
MimeBodyPart rootMimeBodyPart = new MimeBodyPart();
rootMimeBodyPart.setDataHandler(dh);
rootMimeBodyPart.addHeader("Content-Type",
"application/xop+xml; charset=" + charSetEncoding +
"; type=\"" + SOAPContentType + "\"");
rootMimeBodyPart.addHeader("Content-Transfer-Encoding", "binary");
rootMimeBodyPart.addHeader("Content-ID", "<" + contentId + ">");